problem with plotting histogram in matlab
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Hey
I want to have some strings ind the x-axis and procent % in the y-axis. How can I make a histogram in matlab with af string i x-axis and procent in y-axis?
thank you :)
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Zahra S. Abd Al-Hassan
2016-11-19
编辑：Zahra S. Abd Al-Hassan
2016-11-19
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Image Analyst
2016-11-18
Try this:
data = randn(1,1000000);
histogram(data, 'normalization', 'probability', 'edgecolor', 'none'); % or might want 'normalization', 'probability'
grid on;
ax = gca
ax.XTickLabels = {'image', 'analyst', 'rocks', 'whatever', 'fubar', 'snafu', 'blah blah', };
fontSize = 20;
title('Never say "blah blah blah" when "blah" will do', 'fontSize', fontSize);
xlabel('My Categories', 'fontSize', fontSize);
ylabel('Percent', 'fontSize', fontSize);
Steven Lord
2016-11-18
If you have categorical data, for instance a list of weather reports:
weatherValues = {'sunny', 'cloudy', 'rain', 'thunderstorm'};
indices = randi(length(weatherValues), 1, 100);
weatherPerDay = weatherValues(indices);
weatherCategories = categorical(weatherPerDay); % or
weatherCategories = categorical(indices, 1:length(weatherValues), weatherValues);
histogram(weatherCategories, 'Normalization', 'probability')
To check, how many elements in weatherCategories were 'rain'? Since we had 100 samples, this should be 100 times the percentage given in the histogram for the 'rain' bar.
sum(weatherCategories == 'rain')
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